op {
  name: "RefMerge"
  input_arg {
    name: "inputs"
    type_attr: "T"
    number_attr: "N"
    is_ref: true
  }
  output_arg {
    name: "output"
    type_attr: "T"
    is_ref: true
  }
  output_arg {
    name: "value_index"
    type: DT_INT32
  }
  attr {
    name: "T"
    type: "type"
  }
  attr {
    name: "N"
    type: "int"
    has_minimum: true
    minimum: 1
  }
}
